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Old 01-06-2013, 10:27 AM
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heritage heritage is offline
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Join Date: Aug 2003
Location: New Jersey
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Originally Posted by Smallaxe View Post
Here is a quick and easy to understand statement about How Microbrial Mineralization Works...
In addition to their role in cementing soil aggregates mentioned above, soil microbes are of paramount importance in cycling nutrients such as carbon (C), nitrogen (N), phosphorus (P), and sulfur (S). Not only do they control the forms of these elements [e.g. specialized soil bacteria convert ammonium N (NH4+) to nitrate N (NO3-)], they can regulate the quantities of N available to plants. This is especially critical in systems relying on organic fertilizers. It is only through the actions of soil microbes that the nutrients in organic fertilizers are liberated for plants and use by other microbes. Soil microbiologists call this process mineralization [the conversion of organic complexes of the elements to their inorganic forms, e.g., conversion of proteins to carbon dioxide (CO2) ammonium (NH4+) and sulfate (SO4=)]. It is perhaps the single-most important function of soil microbes as it recycles nutrients tied up in organic materials back into forms useable by plants and other microbes. In fact, the so-called Principle of Microbial Infallibility (popularized by Dr. Martin Alexander of Cornell University) states that for every naturally occurring organic compound there is a microbe or enzyme system that can degrade it. Note that this applies to naturally occurring compounds. ... It is through the process of mineralization that crop residues, grass clippings, leaves, organic wastes, etc., are decomposed and converted to forms useable for plant growth as well as converted to stable soil organic matter called humus. Herein lies another important role for the larger soil animals like earthworms. The large organisms function as grinders in that they reduce the particle size of organic residues making them more accessible and decomposable by the soil microbes. The soil microbial population also further decomposes the waste products of the larger animals. Thus, the activities of different groups of soil organisms are linked in complex "food webs".

So is Sumagreen microbes, gobbling up so much thatch the N is making the grass grow beyond normal bounds
Is there some other ingredient that is causing the excessive top growth???

Something isn't right about this discussion and no one is able to acknowledge the 'elephant in the room'...
Good questions axe.

Ryegrass does not produce a thatch layer and I do not know if Decomposers in the sumagreen are out compeating the good guys?

Clippings recycled yes.

P is most available in the warm soil temps......But the P in my sandy loam soils is on the low side.

What other Mineral element has such an effect on top growth besids N or P?

Irrigation water is on the hard side so enough buffer there to bind some of the soluable P.

Perhaps the Humic Acid in the Sumagreen is too high and knocks off too much bound Ca, Mg, P at this time?
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